Basic unit of the ecological hierarchy is

• A. Population
• B. Community
• C. Ecosystem
• D. Individual

The basic unit of the ecological hierarchy is D. Individual. An individual organism represents the smallest level of organization in ecology, serving as the foundation for larger groups such as populations, communities, and ecosystems.

Understanding the Ecological Hierarchy

In ecology, the structure is organized in levels:

• Individual: A single organism.
• Population: A group of individuals of the same species in a specific area.
• Community: Different populations interacting in a shared environment.
• Ecosystem: A community along with its physical environment.

Each level builds upon the previous one, highlighting the complexity of interactions in nature.